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// Standard C
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
// System
#include <unistd.h>
// Project
#include "config.h"
#include "mqtt.h"
#ifndef UNUSED
# define UNUSED(x) (void) (x)
#endif
static volatile bool terminate = false; // NOLINT
static void
handler(int signal)
{
if ( signal == SIGINT ) {
terminate = true;
}
}
static void
cleanup(void)
{
mosquitto_lib_cleanup();
}
static void
init(void)
{
(void) signal(SIGINT, handler);
mosquitto_lib_init();
(void) atexit(cleanup);
}
static void
callback(struct mosquitto *client, void *userdata, const struct mosquitto_message *message)
{
UNUSED(client);
UNUSED(userdata);
printf("message '%.*s' for topic '%s'\n",
message->payloadlen, (const char *) message->payload,
message->topic);
}
int
main(void)
{
init();
struct mosquitto *client = connect(
CLIENT_ID,
USERNAME,
PASSWORD,
HOST,
PORT,
callback,
NULL);
if ( !client ) {
return EXIT_FAILURE;
}
run(client, (const char *[]){ TOPIC, NULL }, &terminate);
shutdown(client);
return EXIT_SUCCESS;
}
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